'magnetic variation' definitions:

Definition of 'magnetic variation'

From: WordNet
noun
The angle (at a particular location) between magnetic north and true north [syn: magnetic declination, magnetic variation, variation]

Definition of 'magnetic variation'

From: GCIDE
  • magnetic declination \magnetic declination\ n. The angle (at a particular location) between magnetic north and true north; called also magnetic variation. [WordNet 1.5]

Definition of 'magnetic variation'

From: GCIDE